|
|
01-10-2018, 03:05 PM | #1 |
Captain
205
Rep 729
Posts |
GT4 Water Pump
Just a PSA.
If anyone is planning on replacing their stock water pump, Bimmerworld has a few M3 GT4 water pumps on sale. These are Motorsport pumps and have a metal impeller instead of a plastic one. It seems like a worthwhile upgrade (at the sale price, at least). I picked one up and put it on my shelf for when I refurbish my M3's cooling system. |
01-10-2018, 04:27 PM | #3 |
IG: @dj_dub
1808
Rep 1,452
Posts
Drives: 2010 BMW E90 M3 - SG/FR 6MT
Join Date: Jan 2013
Location: SF Bay Area to Las Vegas
|
I replaced mine with this one from FCP Euro which also has a metal impeller:
https://www.fcpeuro.com/products/bmw...in-crp-wpr0047 Cheap price and lifetime warranty, can't beat that! Changing the water pump is not that hard, just takes a little time and patience. The hardest part for me was getting the belt back on the pulley. I'd also recommend changing your thermostat and temp sensor while you do this job as preventative maintenance since you're already working in that area.
__________________
CarboProject CF Plenum | Dinan CF Intake | ESS Tune | RKP X-Pipe | Akra w/CF Tips | MFactory CF DS | CSF Cooling | AST 5200 | Hotchkis F/R Sways | SPL/Ground Control/Fall-Line Arms | DEFIV Diff Brace | StudioRSR Rollcage | 3-piece BBS RT88 | Michelin PS4S | Brembos F/R | Recaro Profi SPG XL | CAE Ultra Shifter | Perf Elec Wheel V2 | BAVSOUND | GT4 CF Front Lip/Canards/Rear Wing | Arkym CF Rear Diffuser | Forcewerkz CF SS | Varis CF Lower Tray | Turner Skidplate | BayOptiks Headlights
|
Appreciate
1
roastbeef11591.50 |
01-10-2018, 04:35 PM | #4 | |
Lieutenant
50
Rep 511
Posts |
Quote:
|
|
Appreciate
0
|
01-10-2018, 11:35 PM | #5 |
Brigadier General
1429
Rep 3,007
Posts |
Most aftermarket replacement water pumps for the S65 have the metal propellers.
__________________
INSTAGRAM: GORDON.M3
North American Mr12Volt Carplay/Android Auto Distributor DINAN | EVOSPORT | VAC | ARP | RD SPORT | NEEZ | EIBACH | CSF | IND | BILSTEIN | KLASSEN | BREMBO | ENDLESS | BBS | BPM SPORT | PROJECT MU | EVENTURI |
Appreciate
0
|
01-11-2018, 02:50 AM | #6 | |
Lord Scrip
1823
Rep 3,018
Posts
Drives: 2011 M3 Coupe
Join Date: Jan 2012
Location: LA,Ca
|
Quote:
__________________
|
|
Appreciate
0
|
01-11-2018, 03:14 AM | #7 |
Lieutenant
50
Rep 511
Posts |
|
Appreciate
0
|
01-11-2018, 06:31 AM | #9 |
Lieutenant General
5269
Rep 10,664
Posts |
In the 7 years I have been active here, I have read next to nothing about water pump failures or radiator failures or expansion tank failures. I have read about thermostat failures.
|
Appreciate
1
SYT_Shadow11501.50 |
01-11-2018, 08:20 PM | #10 | |
Retired Curmudgeon
2989
Rep 4,057
Posts |
Quote:
The plastics have gotten a whole lot better since the first plastic impeller water pumps came out (and self disassembled).
__________________
'19 X3 M40 Carbon Black/Oyster, '21 X7 40i AW/Black, Past BMWs: '18 M550i, '18 330 GT, '16 X5 40e, '11 E90M3, '06 X5 4.4, '03 330i ZHP, '02 M3, '97 Z3 2.8, '95 M3 (2x), '94 530i (manual), '92 525i (manual), '88 M3, '87 325iS |
|
Appreciate
0
|
01-12-2018, 10:04 AM | #12 |
Captain
255
Rep 633
Posts |
|
Appreciate
0
|
01-12-2018, 10:29 AM | #13 |
Major General
2761
Rep 5,482
Posts |
All metal impellers are not created equal. Looks like the aftermarket metal impellers have a significantly thicker vane than the GT4 impeller and the stock composite impeller, would have to spin it at the rpm the pump sees at 6k+ to see if it starts cavitating earlier or later than the stock or GT4 setups, but something to think about
GT4: Stock replacement from ECS: Genuine BMW stock replacement:
__________________
|
Appreciate
1
roastbeef11591.50 |
01-12-2018, 10:40 AM | #14 |
Lieutenant Colonel
421
Rep 1,678
Posts
Drives: 2011 MCB E92 M3
Join Date: Jun 2013
Location: Austin, Texas
|
Mine disintegrated on my E36 M3 while on the highway causing the car to overheat and warp the head.
__________________
2011 Monte Carlo Blue E92 ///M3 - ESS VT2-625
|
Appreciate
0
|
01-12-2018, 12:04 PM | #15 | |
Captain
205
Rep 729
Posts |
Quote:
I keep wondering about the small black specs I find when I do coolant changes on my car. I suspect they are pieces of plastic from something in the system but there's no way to know from what (e.g., impeller, hose connections, reservoir, radiator sides, etc.). |
|
Appreciate
0
|
01-12-2018, 12:32 PM | #16 |
Lieutenant General
5269
Rep 10,664
Posts |
I wonder who makes the Motorsport one and whether it is being sold as one of the aftermarket replacements.
For the E36, Stewart GMP makes a very nice billet impeller pump - I have run one for about 10 years. Testing showed it outflowed the BMW pump and was less prone to cavitation. |
Appreciate
0
|
01-12-2018, 01:25 PM | #17 |
IG: @dj_dub
1808
Rep 1,452
Posts
Drives: 2010 BMW E90 M3 - SG/FR 6MT
Join Date: Jan 2013
Location: SF Bay Area to Las Vegas
|
Just because we haven't seen or heard any issues with the factory stock impellers/water pumps, doesn't mean they can't become an issue or either nobody has reported any on the interwebz. If I was already replacing the thermostat and temp sensor, IMO it's smart to change the water pump as well since you're already working in that area. Doesn't cost much and not too much added work involved...better safe than sorry.
After taking out my stock water pump, I placed it on my garage floor vertically and it lightly fell on it's side, the plastic impeller broke easily. It was pretty damn brittle after 73k miles if you ask me. Glad I replaced that part.
__________________
CarboProject CF Plenum | Dinan CF Intake | ESS Tune | RKP X-Pipe | Akra w/CF Tips | MFactory CF DS | CSF Cooling | AST 5200 | Hotchkis F/R Sways | SPL/Ground Control/Fall-Line Arms | DEFIV Diff Brace | StudioRSR Rollcage | 3-piece BBS RT88 | Michelin PS4S | Brembos F/R | Recaro Profi SPG XL | CAE Ultra Shifter | Perf Elec Wheel V2 | BAVSOUND | GT4 CF Front Lip/Canards/Rear Wing | Arkym CF Rear Diffuser | Forcewerkz CF SS | Varis CF Lower Tray | Turner Skidplate | BayOptiks Headlights
|
Appreciate
0
|
01-12-2018, 02:20 PM | #18 |
Captain
212
Rep 875
Posts |
In the picture of the pumps, it looks like the vane of the GT4 is in the opposite direction of the other 2. Does that matter or the pictures are mirrored?
|
Appreciate
0
|
01-13-2018, 12:21 PM | #19 | |
Retired Curmudgeon
2989
Rep 4,057
Posts |
Quote:
If you're in that deep, you may as well replace the pump. I agree.
__________________
'19 X3 M40 Carbon Black/Oyster, '21 X7 40i AW/Black, Past BMWs: '18 M550i, '18 330 GT, '16 X5 40e, '11 E90M3, '06 X5 4.4, '03 330i ZHP, '02 M3, '97 Z3 2.8, '95 M3 (2x), '94 530i (manual), '92 525i (manual), '88 M3, '87 325iS |
|
Appreciate
1
dj_dub1807.50 |
01-13-2018, 02:32 PM | #20 |
Major General
2761
Rep 5,482
Posts |
If your pump falls on its side inside the engine bay you have already reached a point where pump durability had become irrelevant, and should probably grab a fire extinguisher
|
Appreciate
0
|
01-29-2018, 07:06 PM | #21 |
Brigadier General
1429
Rep 3,007
Posts |
I just got my REIN pump. It says its Made in Germany.
BMW probably went with plastic impellers to keep the weight of the engine down. The metal on this impeller is not as nice as the aluminum one from the GT4 pump but still very solid and smooth pump. As you can see from the photos the impeller is quite rough and not as polished as the GT4 alu impeller. Still better than plastic!
__________________
INSTAGRAM: GORDON.M3
North American Mr12Volt Carplay/Android Auto Distributor DINAN | EVOSPORT | VAC | ARP | RD SPORT | NEEZ | EIBACH | CSF | IND | BILSTEIN | KLASSEN | BREMBO | ENDLESS | BBS | BPM SPORT | PROJECT MU | EVENTURI |
Appreciate
1
Theodore672.50 |
Post Reply |
Bookmarks |
|
|